Method and apparatus for the manufacture of corrugated board



K. WANDEL METHOD AND APPARATUS FOR THE MANUFACTURE OF CORRUGATED BOARDFiled Jan. 14, 1922 Patented Dec. 16, 1924.

UNITED STATES To all whom it may concem: L Be it known that I, KURTWANDEL, a citizen of the United States, and resident of New York, countyof New York, State of N. Y., have invented an Improvement in Methods andApparatus for the Manufac: ture of Corrugated Board, of which thefollowing description, in connection with the accompanying drawings, isa specification, like characters on the drawings representing like partsin each of the several views.

This invention relates to the manufacture of corrugated paper board andmore particularly to the production of a paper board composed of acorrugated layer having facing layers applied to one or both sidesthereof by cement-itious binderof an asphaltic or like waterproofcharacter.- -Diiiiculty has hitherto been experienced in making paperboard of this kind in a continuous operation for the reason that thestraw board stock of which the corrugated layer is ordinarily maderequires to be conditioned or tempered by treatment with water or steamto render the same soft and pliable whereby it is adapted to receive thecorrugations, and so that the corrugations will set upon the ting ormoistening of the board has rendered it incapable of adhesion with theasphaltic coating of the surface facing layer and has thus rendered itimpossible to complete the board by the application of this layer at asingle operation. The object of the present invention is to provide animproved method and apparatus whereby the straw board may be wetted ormoistened to the required degree, then corrugated while moistened, thenimmediately dried, and finally united with a coated surface layer atoneor both sides thereof in a series of continuing steps of a singleoperation; The foregoing andother obiects and advantages of theinvention will more fully appear from the following with theaccompanying drawin s. and the distinctive features of novelty will bepointed out in the appended claims.

Referring to the drawings:

The figure is a diagrammatic view partly in side'elevation and partly inlongitudinal vertical section showing an apparatus for carrying out theinvention and illustrating the method thereof.

indicates a roll of suitable stock for 'web evenly with the moisture.

drying of the corrugated board. This wetl.

detailed description. taken in connection PATENT OFFICE.

KURT wANnEL, on NEW YORK, N.,Y.- I mnrnon AND APPARATUSFOR THEMANUFACTURE or conauea'rnn BOARD.

Application filed January 14, 1922. Serial No. 529,138.

the production of the corrugated layer, e. g. straw board as customarilyemployed for this purpose. The web 11 drawn frm this roll is led aroundguide rolls 12 through a tank 13 containing water and adapted to softenthe stock as it passes therethrough. The web is thenled between a pairof rolls 14 adaptedv to promote the saturation of the Thence the web isled around a lower corrugating roll 15 andinto the bite between it and arelatively large upper corrugating roll 16 which meshes with the roll15. Before reaching the corrugating' roll 15 the paper may be subjectedto further moistening and conditioning by steam delivered from an'apertured steam pipe 17 over which. the web passes. It should be hereunderstood that the web may be softened and conditioned for corrugatingeither by the use of the steam treatmentfrom the pipe 17 alone, or byits immersion in the tank 13 alone, or by both these means incombination as herein shown as may be found necessary or desirable underthe conditions of operation. The corru gating roll 16 is relatively ofvery large size as compared with the other rolls employed and this rollis heated by steam applied internally thereof in usual mannen Thecorrugated web is carried around by this roll or drum 16 for asubstantial distance. i. e. as shown through half the circumferencethereof and it may be held closely pressed into engagement with the drumby an endless belt 17 of felt or the like mounted on rolls 18 so as toengage the web and hold it pressed against the drum. A roll 19 ismounted above the roll 16 in position to co-operate therewith forpressing the coated surface of a facing web 20 into contact with thetips of the corrugations of the corrugated web. The facing web 20 is ledfrom a roll 21 around a guide roll 22 and through a coating stationcomprising a pair of rolls 23, the lower one of which extends into atank 24 containing asphalt rendered temporarily fluid by heat orvolatile solvent, preferably the former. The dimension of the largerheated corrugated roll 16 is such that the corrugated web borne therebyas described'is substantially dried out so that when it is pressed intoengagement with the coated surface of the web 20, it will unitetherewith and form a single faced corrugated board as indicated at 25.In case it be desired to produce a double faced corrugated board,another facing web 26 is drawn from a roll 27 through an asphalt coatingstation 28 and pressedinto enga ement with the lower side of thecorrugate layer by a pair of rolls 29, these being located adjacent tothe corrugating rolls and so that the single faced corrugated board 25may be delivered directly thereto. The double faced corrugated boardthus produced, indicated at 30,, thus has two asphalt coatings whichcementitiously unite the facing layers with the corrugated layer andproduce an exceptionally strong and thoroughly waterproof corrugatedboard. I am aware that the invention may be embodied in other specificforms without departing from the spirit or essential attributes thereof,and I therefore desire the present embodiment to be considered in allrespects as illustrative and not restrictive, reference being had to theappended claims rather than tothe foregoing description to indicate thescope of the invention.

Having describedmy' invention, what I claim as new and desire to secureby Letters Patent is:

1. The herein described method which consists in softening a paper webby saturation with moisture, corrugating the, Web, drying the Web byrelatively long contact with a heated element of the corrugating means,and pressing the dried web into contact with an asphalt coated surfaceof a facing web in a continuous sequence of steps.

2. The herein described method which sists in softening a paper web bysaturation with moisture, corrugating the web, drying the web byrelatively long contact'with a heated element of the corrugating means,and pressing the dried web into contact with asphalt coated surfaces oftwo facing Webs at the respective sides of the corrugated web in acontinuous sequence of operative steps.

rugated web in contact with said relatively i large roll for asubstantial interval suflicient to dry the same, and means for pressingan asphalt coated web into contact with the dried corrugated web.

4. Apparatus of the kind described com- I prising means for saturating astraw board web to condition the same for corrugating, means'forcorrugating the web including a relatively large, heated corrugatingroll, means for holding and guiding the corruperiod suflicient to drythe same, and means,

for pressing coated facing webs into contact w1th the opposite sides ofthe corrugated web 1n a continuous sequence of operative steps.

11 testimony whereof, I have signed my name to this specification.

KURT WANDEL.

0o gated web in contact with said roll for a a

